Webhook.site
Test HTTP webhooks with this handy tool that displays requests
...The completely open-source, MIT-licensed version is available on Github, which can be self-hosted using e.g. Docker, is great for testing Webhooks, but doesn’t include features like Custom Actions. The app was built with Laravel for the API and Angular.js for the frontend SPA. Transforming Webhooks into other formats, and re-sending them to different systems. Send Webhooks to a server that’s behind a firewall or private subnet. Connect different APIs that aren’t compatible. Building contact forms that send emails.